Ring of dragons

A ring of dragons is a brass ring that looks like a dragon biting its own tail. They are made and used by the Cult of the Dragon and no more than six dozen exist. The wearer can communicate verbally or telepathically with any dragon he or she can see, can cast a silent image once a day of any dragon he or she can recall from memory, and can call any dracolich or evil dragon by name, although this does not guarantee that the creature will respond or arrive. The ring is worth around 25,000 gold pieces.[1]